Question

He gastrointestinal tract is part of the endocrine system because it releases ___ that regulate digestion and the rate at which food moves through the digestive system. question 7 options: enzymes hormones mucus nerves

Answer 1

The gastrointestinal tract is part of the endocrine system, which is all about hormones, so we can assume that the gastro tract probably does release hormones.
And our assumption is correct — it releases hormones such as gastrin (most importantly) and secretin, which help regulate the process of digestion.